Malicious PDF — malware analysis report

Static analysis result for SHA-256 2855676500845225…

MALICIOUS

PDF

76.3 KB Created: 2021-03-28 19:10:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 59de2e5e7011d2b458bcaa5c91e2ea26 SHA-1: 9ebab8d73f79fece73318ba9f14f8e56f48ac162 SHA-256: 285567650084522572df8b62d876d52b96ef55e2c94f5e628853199d3afdc253
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious domain, likely intended to host a malicious payload or phishing content. The document body, though heavily obfuscated, suggests a lure related to 'Buddhism nirvana pdf', aiming to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9217

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://dugedepap.ru/award?keyword=buddhism+nirvana+pdf
    • http://mesretly.xyz/rhinoceros_5_tutorial_espaolt3mid.pdf
    • https://cdn-cms.f-static.net/uploads/4476420/normal_6025372a640b2.pdf
    • http://avit0.cc/nisekulil8x2bx.pdf
    • https://static.s123-cdn-static.com/uploads/4464878/normal_5fc6da66cd0fc.pdf
    • http://checkmycredit.info/kewowuwexavapufezaboa3rrj.pdf
    • http://voztrans.ru/balveer_returns_hdtzu4i.pdf
    • http://operationhomeplate.com/health_psychology_9th_editionfzmdg.pdf
    • http://snt-br.ru/53_bank_hours_today3ukq9.pdf
    • https://cdn-cms.f-static.net/uploads/4450724/normal_6058c55963927.pdf
    • http://uscovidcharts.com/66199967464ej633.pdf
    • https://static.s123-cdn-static.com/uploads/4503584/normal_6003cb0f259bd.pdf
    • http://hookup673.site/emergency_medicine_salary_by_statecr7mq.pdf
    • https://cdn-cms.f-static.net/uploads/4426088/normal_600d6a570d84b.pdf
    • http://itmax.info/amazing_hero_gamed662l.pdf
    • http://maykistore.ru/687264430v5njm.pdf
    • http://sodahq.club/33170407411xtwzq.pdf
    • http://extrameets.fun/harley_flat_rate_labor_guidecwej9.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://a0f1d9c0-ea46-4e0e-9383-d87711d3127f.filesusr.com/ugd/1e3fb7_b1232a3b4dbe434aaba5296f3eada7d4.pdf?index=true
    • https://2ddedb0e-b7b0-41c9-a8bc-c018bd0e6e4c.filesusr.com/ugd/70094d_75cf12cca6564f69889a359b4c9a4fb6.pdf?index=true
    • https://uploads.strikinglycdn.com/files/b7701cf0-1976-4815-8a43-228b8ab3752e/wikugozaf.pdf
    • https://80b2a579-f9ed-4aa0-b91a-ac3c8973c086.filesusr.com/ugd/353d00_300a55f4007c4919956b191e78adf134.pdf?index=true
    • https://44bb6ee8-a0fe-4f72-890f-0f0a2fec05cf.filesusr.com/ugd/b65acf_d9c5954ca7384a6290763a26d2b8a54b.pdf?index=true
    • https://uploads.strikinglycdn.com/files/291f2d99-3c00-45ec-8b1c-8c7778651616/la_crosse_bc-700_manual.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f72d.bin
5720d15579c828c97c3d871b8baa6e841ab338d2712eac25f40661e77d3b7f49
pdf-font-stream PDF embedded font (sfnt) at offset 0xF72D 5356 bytes
font_01_sfnt_off00010941.bin
5dc19c8b8187ace94c5e6569fb60560c83bcc9158138c7d6df057de38502f3c0
pdf-font-stream PDF embedded font (sfnt) at offset 0x10941 10632 bytes